package Demo;

public class system {
    public static void main(String[] args) throws Exception {
        long l = System.currentTimeMillis();
        for (int a = 0; a < 10; a++) {
            System.out.println(a);
        }
        long l1 = System.currentTimeMillis();
        System.out.println("time=" + (l1 - l));
        String s="2";
        String str[]={"1","2","3"};
        String str1[]={"123456789","4","5"};
        System.arraycopy(str,0,str1,0,1);
        for(Object obj:str){
            System.out.println(obj);
        }
    }

}
